The financial crisis has boosted Barclays Capital and JPMorgan’s commodities business as commercial banks benefit from their stronger credit position by gaining new clients, ­according to Greenwich Associates, the influential consultancy.

Goldman Sachs and Morgan Stanley remain the two top banks in commodities, but the Greenwich Associates’ 2009 commodities survey, a sector benchmark, shows JPMorgan and Barclays Capital have “emerged as a new tier of tough competitors”, gaining business in 2008 and early this year.